Olympus FlexoFORM - Appendix B: True Defect Length Calculation

10-003591-01EN [Q7780031], Rev. 4, January 2020
Calculating True Defect Length 77
Appendix B: Calculating True Defect Length
To calculate the true defect length (Lo) along the index axis, use equation (2) on
page 77. The variables are illustrated in Figure B-1 on page 77.
Figure B-1 Variables for calculating true defect length along the index axis
(2)
L
o
= True defect length
l = Measured defect length
R
o
= Outside radius
h = Water column height (9 mm for SFA1-FLEXO
and SFA1-AUTO wedge series, and 11 mm for
SFA1-SMALL wedge series)
d = Measured depth of defect
t = Thickness of material (reference only)
L
0
R
o
d–()l
R
o
h+()
----------------------=